Medium4.8WatchGuard

Medium [CVE-2025-4804] WatchGuard Firebox Stored Cross-Site-Scripting (XSS) Vulnerability in Hotpot Configuration

This medium-severity WatchGuard advisory covers CVE-2025-4804 affecting Fireware OS.

CVE-2025-4804 Published May 16, 2025Updated by vendor Aug 8, 2026

CVE-2025-4804

Affected products & platforms

WatchGuardFirebox / Fireware

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Summary

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in WatchGuard Fireware OS allows Stored XSS via the spamBlocker module. This vulnerability requires an authenticated administrator session to a locally managed Firebox.

Affected versions

Fireware OS 12.0 before 12.11.2
Fireware OS 12.5 before 12.5.13

Official advisory · high-confidence parse· fetched 2 hours ago·verify at source

Fixed versions

12.11.2
12.5.13

Official advisory · high-confidence parse· fetched 2 hours ago·verify at source

Mitigation

Upgrade to a fixed release: 12.11.2, 12.5.13. That is the remediation for this advisory.

The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.

Official advisory · high-confidence parse· fetched 2 hours ago·verify at source

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